I new to the forum and hope this post is in the right thread.
Anyways i have been having problems with loading EMPTY mags in to my MP-15. My p mags seated fine unloaded with the bolt back or locked. With the Drought of P mags since the school shooting a was able to crab some bushmaster aluminum mags and they wont seat at all with the bolt back or locked. Im new to all this and dont know if its because they are bushmaster mags or what. If i remove the upper from the lower the mags its lock into place just fine. If someone could please help i would appreciate it!